Adjustable sieve.



No. 761,561. PATENTED MAY 31, 1904. 0; W. VAN WYE. I

ADJUSTABLE SIEVB,

APPLICATION FILED JAN. 12,1903.

N0 MODEL.

Ive-761,561.

UNITED STATES Patented May 31, 1904.

PATENT OFFICE.

ADJUSTABLE s |EvE.;-' 1

SPECIFICATION forming part of Letters Patent No. 761,561, dated May 31, 1904. I 7 Application filed JanuarylZ, 1903. Serial No. 138,734. .(No model.)

To all whom, it may concern:

Be it known that 1, CHARLES W. VAN WYE, a citizen of the United States, residing at Freeport, in the county of Harper, State of Kansas,

have invented certain new and useful Improvements in Adjustable Sieves; and I do hereby declare the followingvtobe a full", clear, and exact description of the invention,such as will enable others skilled in the art to'which it appertains to make and use the same.

This invention relates to sieves for grainseparators; and it has for its object toprovide a sieve including sections each having a de pending deflector-plate so arranged that the air-blast will pass vertically through thesieve' or at right angles to the upper faces of the sections of the sieve instead of transversely thereof, so that thechaff and other light matter will be first raised bodily from the sieve before it is carried laterally therefrom. This action serves to better separate the light particles from the grain, which by its weight resieve.

In the drawings forming a portion of this specification, and inwhich like numerals of reference indicate similar parts in the several views 1 Figure 1 is a bottom perspective View showing a sieve'embodying the present invention. Fig. 2 is a longitudinal section of the sieve. Fig. 3 is, a top plan view.

Referring 'now to the drawings, the sieve comprises aframe, including end portions 5 and (Sand the side portions 7 and 8, which latter project above the end portions. Within the frame are disposed transversely sections of sieves each of which is in the form of a plate 9, ha'vingat its end trunnions 10, which are journaled in the sides of the frame, and one edge of each of the plates is bent 'ever openings there may be between two plates, so that in order to blow the grain from the screen the blast must lift it bodily and then carry it laterally, and the grain being heavy this does not occur. If the air-blast struck the opposite sides of the flanges and they depended at obtuse angles to their respective plates, then should two plates be not in close contact the air would pass between the plates and would tend to pass laterally over the tops of the plates, and thus blow the grain from the plates with the chafl'. To shift the plates'and separate them to precipitate the grain therefrom after it is cleaned, arockshaft 13 is provided and is mounted in suitable bearings upon the end of the screen-frame, said rock-shaft having crank-arms 1 1, as illustrated.

Depending from the plates of the screen adjacent to the ends thereof are arms 15 and 16, to which are pivotally connected the shiftrods 17 which are connected in turn to said crank-arms, so that when the rock-shaft is operated the plates of the screen will be oscillated to lie with their body portions in a common horizontal plane or to lie in separate parallel planes at angles to ahorizontal plane.

Extending longitudinally of the'upper side of the frame and connected to the ends thereof are brace-rods 18, which give rigidity to the structure.

It will be understood that the rock-shaft may be operated by means of a handle or in any suitable manner, that modifications of the specific construction shown may be made,

lel with the axis of movement of the plate and depending at an angle thereto to arrest a blast after its passage across the plate and deflect it through the perforations, and means for rocking the plates.

In testimony whereof I aflix my signature in presence of tWo Witnesses.

CHARLES V. VAN YVYE.

Witnesses WV. E. PETERMAN, WV. H. TAPP. 

